There have been a number of articles published in the last week or so about the need for requiring liability for gun insurance.
Slate
Robert Cyran and Reynolds: Holding Congress Should Pushfor Mandatory Gun Insurance
This article is largely concerned with the constitutionality of such regulation and lists reasons why it might be.
Forbes
This article argues for market-based risk pricing and gives general information about attitudes toward gun regulation in the US and about actual regulation in other countries.
Douglas Cohn: Gunowner insurance would ensure responsibility
Cohn discusses NRA power is resisting regulation and argues for insurance.
We need more than simple discussion of the advantages and barriers to gun insurance. We need analysis of the possible means to achieve an actual system in place that protects persons who are injured with guns.